Presentations: The Top Course Unit 186
Listen to the recordings to practice this study group.
Repeat each line after the speaker.
Practice one group at a time.
Start with Part A Slow reading then Part A Normal speed. Then go on to Part B.
Unit 186 Part A |
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Unit 186 Part B |
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| 13 Whether humans could have killed off the megafauna by hunting them for food … 14 depends on the date modern humans first arrived in Australia. 15 That isn't to say they had no impact, but it may have been by changing the landscape, 16 largely as a result of fires which destroyed the birds" food, rather than through hunting. 17 It's possible to examine the egg shells of genyornis and the emu, and, 18 by checking the types of carbon in them, we've been able to reconstruct the diet of these animals. 19 The shape of the beak shows that it was highly dependent on plants, and, of course, 20 the fires would have resulted in a dramatic decrease in trees and shrubs. 21 There must have been extraordinary demands on the ecology of this environment … 22 for the extinctions of the megafauna to have happened at the same time. 23 Fortunately, scientists now have a new insight into the reasons behind this event. |